California Code, Probate Code - PROB § 1043

(a) An interested person may appear and make a response or objection in writing at or before the hearing.

(b) An interested person may appear and make a response or objection orally at the hearing.  The court in its discretion shall either hear and determine the response or objection at the hearing, or grant a continuance for the purpose of allowing a response or objection to be made in writing.

(c) A request for a continuance for the purpose of making a written response or objection shall not itself be considered as a response or objection, nor shall the failure to make a response or objection during the time allowed be considered as a response or objection.